Logged in a few hours too late and now the order I have not received yet has been auto-finalized

I admit I've been distracted and should have paid more attention to the AF timer but I honestly forgot this vendor had it set so short.

I have placed an order from this vendor once before and had it arrived by this time. Now I have no reason to distrust him yet and the package will probably show up tomorrow or sometime this week. But is there anything I can do if something goes wrong or am I just screwed in that case?

When an order Finalizes the market releases the funds to the vendor and considers the order completed. The options to extend or dispute expire when the order finalizes. The only options left is to reach out to the vendor and find a solution. You do have the option to leave feedback, but its best to speak with the vendor before this as feedback is permanent and can not be adjusted later.

You can leave negative feedback on the market and a bad review on tforum. Just don't dispute the order on the market as you forfeit the ability to leave a review. Hopefully your pack comes but if it doesn't you do have a few options.

never ever let auto finalize the clock

you can extend time 2 days before autofinalize